Vitamin C (Sodium Ascorbate)

Buffered, non-acidic form of vitamin C that's gentler on the stomach and well-tolerated at higher doses

Scientific nameSodium L-Ascorbate FormulaC6H7NaO6 Molecular weight198.11 g/mol CAS134-03-2

85 absorption score

10 safety / 10

15 USD per month

5 documented interactions

Check it against something

Evidence level A

Vitamin C (Sodium Ascorbate) with:

99 out of 100

Works better together Compatible. Timing differs, so follow each supplement's own window.

Check it against your whole stack →

What it does

mechanism and evidence for each claim

Enhanced stomach tolerance

Non-acidic form reduces gastric irritation by 70-80%

Neutral pH prevents stomach acid stimulation Evidence A-grade Immediate

Immune system enhancement

Reduces duration and severity of cold symptoms by 8-20%

Supports neutrophil function and antibody production Evidence A-grade 1-2 weeks

Superior bioavailability

Better absorbed than ascorbic acid, especially at higher doses

Buffered form allows better intestinal absorption Evidence B-grade Immediate

Antioxidant protection

Neutralizes free radicals and regenerates other antioxidants

Direct radical scavenging and vitamin E regeneration Evidence A-grade 2-4 weeks

Collagen synthesis support

Essential for healthy skin, bones, and connective tissue

Cofactor for prolyl and lysyl hydroxylases Evidence A-grade 4-8 weeks

Others take these for the same thing

Same goal, different mechanism — check any of them against this one

Probiotics for Autoimmune Disease Support Gut health & immune modulation 10-100 billion CFU daily B 60% Turmeric Anti-inflammatory & antioxidant 300-1000mg A 3% Vitamin D3 Bone health & immune support 1000-2000 IU A 85% Glutathione Master antioxidant & detox support 250-750mg B 20% Astaxanthin Superior antioxidant & skin protection 4-12mg B 20% Zinc Picolinate Superior immune & healing support 15-30 mg A 95%

Or a different form of the same thing

the comparison people search most

Vitamin C (Sodium Ascorbate) vs Vitamin C (Ascorbic Acid) absorption 85 against 80 · $15 against $10 a month 80% Vitamin C (Sodium Ascorbate) vs Vitamin C (Liposomal) absorption 85 against 95 · $15 against $60 a month 95%

All Vitamin C forms ranked by absorption →

Every pair we checked

12 combinations scored by the engine

Vitamin C (Sodium Ascorbate) + Copper Bisglycinate High copper may increase vitamin C oxidation Needs attention 70

Vitamin C (Sodium Ascorbate) + Caffeine No documented interaction either way No known interaction 70

Vitamin C (Sodium Ascorbate) + Creatine Monohydrate No documented interaction either way No known interaction 70

Vitamin C (Sodium Ascorbate) + Whey Protein No documented interaction either way No known interaction 70

Vitamin C (Sodium Ascorbate) + Turmeric No documented interaction either way No known interaction 70

Vitamin C (Sodium Ascorbate) + Lactase Improved calcium absorption when consuming dairy Works better together 82

Vitamin C (Sodium Ascorbate) + Bovine Collagen Essential for collagen synthesis and cross-linking Works better together 82

Vitamin C (Sodium Ascorbate) + DHA Prevents oxidation of DHA and enhances stability Works better together 82

Vitamin C (Sodium Ascorbate) + Vitamin D3 Regenerates oxidized vitamin E Works better together 90

Vitamin C (Sodium Ascorbate) + Fish Oil (EPA/DHA) Protects fish oil from oxidation Works better together 90

Vitamin C (Sodium Ascorbate) + Calcium Carbonate Essential for calcium absorption and utilization Works better together 94

Vitamin C (Sodium Ascorbate) + Iron Sulfate Dramatically enhances iron absorption Works better together 99

Dosage

Divided doses with meals

Daily500-2000 mg

Maintenance500-1000 mg

Therapeutic2000-5000 mg

Mega dose protocols5000-15000 mg (medical supervision)

Sodium content124mg sodium per 1000mg vitamin C

Upper limit 2000 mg NIH ODS

Before you take it

VeganYes

When to expect it

First Effects24-48 hours for immune benefits

Peak Benefits2-4 weeks for antioxidant status

Deficiency Development4-12 weeks with no intake

Toxicity OnsetRare, mainly digestive upset at extreme doses

How to measure it

$40-80

MarkerPlasma ascorbic acid

Optimal50-114 μmol/L (0.9-2.0 mg/dL)

Deficient below11 μmol/L (0.2 mg/dL)

FrequencyRarely needed unless deficiency suspected

What people actually reported to the FDA

CAERS, 245 reports naming it as the suspect

Most reported effects

Dyspnoea 50

Nausea 22

Hypersensitivity 18

Abdominal pain upper 18

Excluded from the list above: choking (41), dysphagia (19). Those are people struggling with the tablet itself, not with the compound.

Named as the suspect 245 reports of 1,000+ that mention it at all

Serious outcome 79% hospitalisation, emergency room or worse

Other Serious or Important Medical Event167

Visited a Health Care Provider57

Hospitalization53

Reports are voluntary and unverified — they record what someone experienced while taking something, not what the compound caused. Counts skew towards products people take a lot of, and a serious outcome is more likely to be reported than a mild one, so these are not rates. How we filter them →

What actually reaches you

The label counts the carrier, your body does not

Absorption Very high 85 of 100 · best absorbed form of this compound

Delivered daily 1062.5 mg

Cost per 100 mg delivered $0.05 comparative — uses the absorption score, not a measured percentage

Works better with

3 documented

Iron

Dramatically enhances iron absorption

Reduces iron to more absorbable form · level A

Vitamin E

Regenerates oxidized vitamin E

Reduces vitamin E radicals back to active form · level A

Bioflavonoids

Enhances vitamin C activity and absorption

Synergistic antioxidant effects and improved stability · level B

What not to take with Vitamin C (Sodium Ascorbate)

2 documented

Copper Excess

High copper may increase vitamin C oxidation

Copper catalyzes vitamin C breakdown · mild significance

Aspirin

May reduce vitamin C levels

Increased urinary excretion · mild significance

Medication interactions

Discuss these with a pharmacist before combining

iron-supplements Beneficial

Enhances iron absorption significantly

What to do: Take together for maximum iron absorption

sodium-restricted-medications Minor

Adds to total sodium intake

What to do: Account for sodium content in daily intake

chemotherapy Moderate

May interfere with oxidative cancer treatments

What to do: Discuss with oncologist

Available forms

bioavailability compared

Ranks 4 of 8 among vitamin c forms. Vitamin C (Liposomal) absorbs better — 95%. Compare all forms →

Sodium Ascorbate 85

Sodium Ascorbate: Non-acidic, Better tolerance, Higher dose capability, Superior absorption

Food sources

before you supplement

Most vitamin C is naturally in acidic form Sodium ascorbate is primarily found in supplements · 85

Too little

deficiency signs

Fatigue and weakness
Joint and muscle pain
Easy bruising
Poor wound healing
Bleeding gums and dental problems
Frequent infections
Scurvy (severe deficiency): loose teeth, hemorrhages

Too much

toxicity signs

Diarrhea and digestive upset (less common than ascorbic acid)
Kidney stone formation (rare)
Iron overload (in susceptible individuals)
Withdrawal scurvy (rebound effect)
Interference with some medical tests

Who benefits most

sensitive-stomachs

Non-acidic form prevents gastric irritation

500-3000 mg daily

high-dose-protocols

Better tolerance allows therapeutic dosing

2000-10000 mg daily

gerd-sufferers

Won't exacerbate acid reflux symptoms

500-2000 mg daily

elderly

Often have more sensitive digestive systems

500-1000 mg daily

athletes-high-dose

Allows higher doses for recovery without stomach upset

1000-5000 mg daily

Where to buy it

compare forms first

Look for Vitamin C (Sodium Ascorbate) at 500-2000 mg per serving. The form that matters here is Sodium Ascorbate.

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How it works

Cofactor for collagen synthesis enzymes
Primary water-soluble antioxidant
Enhances iron absorption by reducing Fe3+ to Fe2+
Regenerates vitamin E and glutathione
Required for carnitine and neurotransmitter synthesis
Supports immune cell function and proliferation

Key findings

what the evidence supports

Better tolerated than ascorbic acid at high doses (clinical experience)
Same immune and antioxidant benefits as ascorbic acid
Preferred form for IV vitamin C therapy (medical literature)
Superior absorption characteristics compared to ascorbic acid (some studies)

Sources: NIH Examine.com · data reviewed 2026-08-02

Compiled by Denis, who maintains this database and holds no medical qualification — every figure here is sourced or derived, never asserted. How we calculate it →

Common questions

What are the benefits of Vitamin C (Sodium Ascorbate)?

Documented effects: Enhanced stomach tolerance; Immune system enhancement; Superior bioavailability; Antioxidant protection. Non-acidic form reduces gastric irritation by 70-80%

How much Vitamin C (Sodium Ascorbate) should you take per day?

The common daily range is 500-2000 mg. By goal — maintenance: 500-1000 mg; therapeutic: 2000-5000 mg; mega dose protocols: 5000-15000 mg (medical supervision); sodium content: 124mg sodium per 1000mg vitamin C.

When is the best time to take Vitamin C (Sodium Ascorbate)?

Divided doses with meals. First effects are typically reported within 24-48 hours for immune benefits.

What are the side effects of Vitamin C (Sodium Ascorbate)?

At excessive doses: Diarrhea and digestive upset (less common than ascorbic acid), Kidney stone formation (rare), Iron overload (in susceptible individuals), Withdrawal scurvy (rebound effect), Interference with some medical tests. Safety rating at normal doses is 10 out of 10.

What should you not take with Vitamin C (Sodium Ascorbate)?

Separate it from Copper Excess, Aspirin by two to four hours. High copper may increase vitamin C oxidation

Does Vitamin C (Sodium Ascorbate) interact with medications?

Documented interactions with iron-supplements, sodium-restricted-medications, chemotherapy. Discuss these with a pharmacist before combining.

How much Vitamin C (Sodium Ascorbate) is too much?

The tolerable upper intake level is 2000 mg per day for adults, per NIH ODS. Above that, the risk of adverse effects rises: Diarrhea and digestive upset (less common than ascorbic acid), Kidney stone formation (rare), Iron overload (in susceptible individuals).

How do you know if you need Vitamin C (Sodium Ascorbate)?

The marker is Plasma ascorbic acid, optimal range 50-114 μmol/L (0.9-2.0 mg/dL). Common deficiency signs: Fatigue and weakness, Joint and muscle pain, Easy bruising, Poor wound healing.

Taken for

59 Immunity

Vitamin D3 · Vitamin C (Ascorbic Acid) · Comprehensive Immune Support Complex

49 Liver & Detox

Turmeric · Vitamin C (Ascorbic Acid) · D-Mannose